On Sunday 27 April 2003 05:30 pm, Cliff L. Biffle wrote: > When I have vchans enabled, every few attempts at opening /dev/dsp* result > in 'Operation not supported by device.' Also, while they're enabled, some > programs (most reproduceably artsd) peg my CPU after outputting sound data > in certain situations. I've had a few people report that they get this issue even with vchans enabled, and I can confirm this. After a kernel rebuild with some debugging switches, I'm now getting a lock order reversal message that seems to coincide with the dsp breakage. Here's the messages, if anyone can make sense of 'em. :-) -Cliff L. Biffle --- lock order reversal 1st 0xc1dea840 pcm0:play:0 (pcm channel) _at_ /usr/src/sys/dev/sound/pcm/sound.c:191 2nd 0xc1dea9c0 pcm0 (sound cdev) _at_ /usr/src/sys/dev/sound/pcm/sound.c:163 Stack backtrace: lock order reversal 1st 0xc1cbb9c0 pcm0:play:0 (pcm channel) _at_ /usr/src/sys/dev/sound/pcm/sound.c:191 2nd 0xc21aab40 pcm0 (sound cdev) _at_ /usr/src/sys/dev/sound/pcm/sound.c:163 Stack backtrace:Received on Mon Apr 28 2003 - 16:09:37 UTC
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